Side element of a shoe upper



FIG. 1 is a side view of a side element of a shoe upper showing the new design; and,

FIG. 2 is a perspective view of the side element of the shoe upper showing the new design.

The broken line showing immediately adjacent to the claimed design represents an unclaimed boundary of the design. The broken line showing the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design.

The varying density of stipple shading represents a contrast in appearance to the adjacent stripes. 

The ornamental design for a side element of a shoe upper, as shown and described. 